Supplement reference
NAC (N-Acetyl Cysteine)
A source-linked reference on NAC (N-Acetyl Cysteine), evidence, safety and product identity. Sources checked 6 September 2026.
Source and review status
Published sources checked
Sources checked on: 6 September 2026
Qualified clinical review: Pending. This page has not been clinically reviewed.
About this source check
AI-assisted editorial source checking covers the cited material and its stated limits. It is not a systematic review, verification of a supplied product, or clinical sign-off.
Editorial role: InfoAddict. Last material change: 6 September 2026. Next source review: 6 March 2027.
Ingredient and preparation
N-acetylcysteine is a derivative of the amino acid cysteine. It is sold in supplements, while some forms have medicine-specific uses in clinical care.
Sources: National Library of Medicine, PubMed
Evidence and limits
The cited systematic review assessed NAC in hospitalised COVID-19 pneumonia, not routine “detox” use. Across three RCTs and five non-randomised studies, certainty for mortality, intensive care and ventilation outcomes was very low and the authors did not support clinical recommendations.
Sources: National Library of Medicine, PubMed
Safety and a useful record
The distinction between a supplement label and a clinically supervised medicine matters. Review respiratory, liver, pregnancy and medicine context with an appropriate professional.
Sources: National Library of Medicine, PubMed, National Center for Complementary and Integrative Health
Record the exact product, reason for use and any prescribed medicines instead of assuming all NAC products are equivalent.
Sources: National Center for Complementary and Integrative Health
Published sources
- N-Acetylcysteine efficacy in patients hospitalized with COVID-19 pneumonia: a systematic review and meta-analysis
National Library of Medicine, PubMed. Published 2023; accessed 6 September 2026.
Supports: Eight studies in hospitalised COVID-19 context, with very-low certainty for hard clinical outcomes; not a general supplement-use claim.
- Safe Use of Complementary Health Products and Practices
National Center for Complementary and Integrative Health. Current NCCIH reference; accessed 6 September 2026.
Supports: General safety, interaction and contamination context. It does not establish ingredient-specific benefit.
Change history
| Date | Change | Clinical-review status |
|---|---|---|
| 6 September 2026 | Source-linked reference published | Pending |
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